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Finding the Fourth Proportional to 793.41, 1,190.43 and 423.21

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Solution

The fourth proportional to 793.41, 1,190.43 and 423.21 is: 634.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.41 : 1,190.43 = 423.21 : x
  2. Step 2: Convert to fraction form
    793.41/1,190.43 = 423.21/x
  3. Step 3: Cross multiply
    793.41x = 1,190.43 × 423.21
  4. Step 4: Simplify right side
    793.41x = 503,801.88
  5. Step 5: Solve for x
    x = 503,801.88/793.41
  6. Step 6: Final answer
    x = 634.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.